91Ó°ÊÓ

Based on the sample, the large-sample \(90 \%\) confidence interval for the proportion of all American adults who actively try to avoid drinking regular soda or pop is (a) \(0.611 \pm 0.020\). (b) \(0.611 \pm 0.025\). (c) \(0.611 \pm 0.031\).

An opinion poll asks an SRS of 100 college seniors how they view their job prospects. In all, 53 say Good. The large-sample \(95 \%\) confidence interval for estimating the proportion of all college seniors who think their job prospects are good is (a) \(0.530 \pm 0.082 .\) (b) \(0.530 \pm 0.098 .\) (c) \(0.530 \pm 0.049\).